Figure 1-13 RIVUXG The Apparent Motion of Stars at Different Latitudes As Earth rotates, stars appear to rotate around us along paths that are parallel to the celestial equator. (a) As shown in this long time exposure, at most locations on Earth the rising and setting motions are at an angle to the horizon that depends on the latitude. (b) At the north pole (latitude 90° north) the stars appear to move parallel to the horizon. (c) At the equator (latitude 0°) the stars rise and set along vertical paths. (a: © David Miller/DMI; b: NPS Photo/Jacob W. Frank; c: O Chul Kwon)